Safety and bobbin-winder attachment for sewing-machines



J. HOCHMAN. SAFETY AND BOBBIN WI NDER ATTACHMENT FOR SEWING MACHINES.

Patented Aug. 9, 1921.

APPLICATION FILED FEB. 9|I921.

2 SHEETS-SHEET 1.

, J. HOCHMAN; SAFETY AND BOBBIN WINDER ATTACHMENT FOR SEWING. MACHINES.

1 APPLICATION FILED FEB- 91 1932],.

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y i-lnwwtoz Jco Mnzan entree stares JACOB HOCHMAN, OF NEW YORK, N. Y.

SAFETY AND BOBBIN-TINDER ATTACHMENT FOR SEWING-MACHINES.

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Specification of Letters Patent.

Y Patented A11 9, 1921.

Application filed February 9, 1921. Serial No. 443,536.

7 0 all whom it may concern:

Be it known that 1, Jason HoorrtmN, citizen of Hungary, residing at NewYork, in the county of New York and State of New York, have inventedcertain new and useful Improvements in Safety and Bobbin-WinderAttachments for Sewing-Machines, of which the following is aspecification. This invention relates to sewing machines generally,having more particular reference to an attachment connected with thebobbin rewinding mechanism, and being intended more particularly for usein workshops where the machines are arranged in rows or groups having acommon drive means.

In machines of this sort as ordinarily arranged the material being sewedon any one of the machines is liable to become entangled in theindividual drive belts, or drive means generally, of adjacent machines.

The present invention has for an object to provide a novel arrangementof covering device for the drive belt and pulleys which can be removedand replaced with great rapidity, and further to provide a novelcarrying means for the spool or roll from which the thread is wound uponthe bobbins.

For further comprehension of the invention, and of the objects andadvantages thereof, reference will be had to the following descriptionand accompanying drawings, and to the appended claims in which thevarious novel features of the invention are more particularly set forth.

Figure 1 of the drawings is a plan View of a group of sewing machinesequipped with the invention.

Fig. 2 is an enlarged end view of one of the machines with its bobbinwinding attachment, the support or bench being shown in transversesection.

Fig. 3 is a front view showing the attachment in position.

Fig. 4-is a perspective view of the device.

In the drawings the reference numerals 10, indicate a pair of parallelbenches along each of which is arranged a row of sewing machines whichare driven by a common drive mechanism in a well known manner, thisarrangement being such as is in common use in workshops. Referring nowin detail to the machine, the reference numeral 12 designating the headof the machine and 13 the fly wheel, which has rigid therewith thepulley 14. This pulley 14 is connected by a belt 15 with a second pulley16 under the bench 1. This pulley 16 is driven from the drive shaft (notshown) by a belt 17 looped over a pulley 18 fixed to the pulley 16. c

The bobbin winding mechanism comprises a horizontal stub shaft 20 on oneend of which is carried the bobbin 21, while the opposite end thereofhas fixed thereon a grooved pulley 22 which is adapted to be moved intoand out of contact with the belt 15, this pulley being carried on theupper ends of a pair of arms 23 hinged to a base plate 24, whichlatteris secured on the bench 10 by a screw 25 passing through a slot 26therein. Further detailed description of the means for shifting thepulley 22 is not considered necessary as these devices are well known tothe art and no novelty is claimed for their detail construction, theparts so far described being all in common use.

According to my invention 1 hinge to the plate 24 a flanged guard orcover 28 for the pulley 14, this guard being here shown as hinged to abracket 29 on the base 10, a coiled spring 30 tending to swing the guardaway from operative position. The flange 28 of the guard may be cut awayas at 31 to accommodate the belt 15.

Hinged as at 33 to the outer end of the base-plate 24v is an angularbracket 34 which extends downwardly over the edge of the bench 10 and atan inclination thereunder as at 34, this bracket having a foot 35 at itslower end upon which the reel of thread 36, from which the bobbin iswound, is rotatably mounted. The inclined portion 34 of the bracket 34extending adjacent the pulleys 16 and 18 is provided on opposite sideswith the parallel projecting cars 37 which project on opposite sides ofthese pulleys and form a guard therefor. Upon the top of this bracket 34is fixed a bearing member 38 onwhich is pivoted an idler 39 over whichthe thread is led to the bobbin 21.

Carried-on the bench 10, in operative relation to the guard 28 andbracket 34, is a device which normally retains the guard in operativeposition and which when moved to release the latter serves to supportthe bracket 34 with the cars 37 removed from position inclosing thepulleys 16 and 18. This device comprises a bar 40 slidably secured tothe bench 10 by a screw 41 passing through a longitudinal slot 42therein, this bar having at one end a raised finger 43 which engages theface of the guard 28 and maintains the latter upright against the actionof spring 30, a base-flange 28* on the guard limiting the movementthereoi toward the pulley 14. The opposite end of this bar 40 has alateral offset 44 which projects under the bracket 84.

It is believed the use of the attachment will be readily understood bythose skilled in the art. Normally the guard 28 and bracket 34 occupythe position shown in Figs. 1 to 3 of the drawings, which the belt 15and its pulleys are shielded from chance entanglement of material beingsewed on any 01 the machines, while the bracket forms in addition aconvenient support for the reel 36. hen access to the pulleys is desiredthe screw 41 is loosened, the bracl 34 swung upward, and the bar 40moved out ward until the linger 43 disengages from the guard 28, thelatter dropping down. This movement of the bar 40 has projected theoffset 44 into a position beyond the edge the bench 10 and upon thescrew 41 being tightened the bracket will be'supported in the positionindicated in 4 in which the ears 3'? are clear of the pulleys 16, 18.

Having thus described my invention what I claim as new and desire toprotect by Letters Patent'of the United States is as follows 1. In asewing m-achine, in combination with a bobbin winding device adapted foroperation by the drive belt of the machine, and a bench supporting saiddevice, a bracket hinged to said device and extending downwardly overthe edge of the bench and under the same and adapted to support a reelof thread on its lower end.

2. In a sewing machine, in combination, a. drive belt, a pair of pulleysover which said drive belt is looped, a bobbin winding device adaptedfor operation by the said drive belt, a removable guard for one of saidpulleys, removable guard for the other pulley, means normally urgingsaid first guard to inoperative position, and means reloasably holdingsaid firstgua-rd in operative position, said last means being adaptedwhen moved to releasing position to support the second guard ininoperative position. i

In a sewing machine, in combination, a drive belt, a pair of pulleysover which said drive belt is looped, a bobbin winding device adaptedfor operation by the said drive belt, a removable guard for one of saidfeet at its lower end pulleys, a removable guard for the other pulley,means normally urging said first guard to inoperative position, andmeans releasably holding said first guard in operative position, saidlast means being adapted when moved to releasing position to support thedrive belt, a removable guard for one of said pulleys, a removable guardfor the other pulley, means normally urging said first guard toinoperative position, and means releasably holdin said first guard inoperative position, said last means being adapted when moved toreleasing position to support the second guard in inoperative position,said last means including a bar adapted'to be moved longitudinally ofitself and set in different positions, and a member formed on said firstguard and adapted to support a reel of thread.

5. In a sewing machine, in combination, a bobbin winding device, a benchsupporting said device, a drive belt by which said device is adapted tobe operated, a pair of pulleys locateo one above and one below saidbench and over which said belt is looped, a guard hinged to said benchand adapted to cover the upper pulley, said guard having an an' gularlyprojecting base flange, a spring normally urgingsaid guard toinoperative p-o, tion, a bracket hinged to said bobbin winding deviceand extending downward under the bench and having an outturned adaptedto support a reel of thread, a pair of cars projecting from saidbracket. and rorming a guard for the lower pulley, and a bar movablysecured upon the said bench and having at one end el engs said. firstguard to retain re operative position, said bar having a lateral offsetat its opposite end adapted to support said bracket with the said earsremoved from guard forming position when the said bar has been moved todisengage the said finger from the said first guard.

in testimony whereof I have afiixed my signature.

JACOB H'OCHMAN.

